Isolation and identification of Metarhizium guizhouense Xct1 and its pathogenicity to Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)

Egyptian Journal of Biological Pest Control

Table 2 Corrected mortality for 1–6 larval instars

Spore concentration (spores/ml)	Cumulative survival rate/%	Corrected mortality rate/% (instar larvae)
Spore concentration (spores/ml)	egg	First	Second	Third	Fourth	Fifth	Sixth
1 × 10⁸	8.33Aa	89.53Aa	86.21Aa	80.23Aa	72.73Aa	61.80Aa	38.64Aa
1 × 10⁷	10.00Aa	83.72Ab	78.16Ab	70.91Ab	54.44Bb	48.31Bb	29.55Ab
1 × 10⁶	21.33Cc	67.44Bc	63.22Bc	52.33Bc	38.84Cc	30.34Cc	18.18Bc
1 × 10⁵	67.67Dd	46.51Cd	43.68Cd	31.40Cd	22.73Dd	21.35Cd	11.36BCcd
1 × 10⁴	87.67Dd	32.56De	34.48Ce	22.09Ce	13.64De	10.11De	4.55Dd

The different lowercase letters within the same column and the different uppercase letters within the same row indicate significant difference at 0.05 level (p < 0.05)